Hirsch, Peter; Hirsch Prüftechnik; Germany
Hirsch, P.B.; HPT Hirsch Prüftechnik GmbH; Germany
Hirsch, H.; HPT Hirsch Prüftechnik GmbH; Germany
Session: Surface Methods 1
Time: 09:40 - 10:00
HPT Hirsch Prueftechnik GmbH develops and supplies mobile and stationary MT-testing equipment. The equipment utilizes AC/DC Pulse Technology for surface crack detection and demagnetization of steel components for industrial applications. There are several important advantages of MT-testing with AC/DC Pulse Technology. For example, it produces crack indications without false indications for unconventionally large test areas within a very short period of time. Therefore, even large components like forged rings and gears with diameters up to 10 m for wind power plants, shafts, and casted or welded components can be quickly MT-tested and/or demagnetized. This presentation describes different industrial applications of AC/DC Pulse Technology with single and multiple current peaks up to 3 x 30,000 A that perform the MT-testing and demagnetization work applying different magnetization techniques. The magnetization techniques are direct current flow, non-contact coil magnetization with two coils as well as a combined method which uses both direct current flow and coil magnetization.